William serves as Declaration Manager for C40’s Green and Healthy Streets Declaration. In this role, William coordinates C40 support towards Green and Healthy Streets Declaration signatories and tracks the implementation of the Declaration in cities, helping to accelerate implementation and achieve effective, ambitious and measurable outcomes on decarbonising transport in cities.

Prior to his current role, William was Benefits Research Officer in the Knowledge and Learning Directorate, where he supported cities with making the case for climate action through demonstrating the wider social and economic benefits. He also supported on a number of additional research projects, including The Case for a Green and Just Recovery released by the C40 Global Mayors COVID-19 Recovery Task Force, and Coal-free Cities: The Health and Economic Case for a Clean Energy Revolution.